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Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime
Sun CQ(孙成奇); Song QY; Hu YP(胡远培); Wei YJ(魏宇杰)
发表期刊INTERNATIONAL JOURNAL OF FATIGUE
2018-12-01
卷号117页码:9-12
ISSN0142-1123
摘要An intermittent loading path (i.e. a pause duration follows after a loading pulse) is broadly employed in a ultrasonic fatigue test to minimize the effect of self-heating in specimens. The exact influence of such intermittent loading strategy remains elusive. We report here a significant fatigue life improvement of a high strength steel in very high cycle fatigue regime subjected to intermittent loading, in contrast to that without the pause duration although the crack initiation mechanism remains the same. This phenomenon is attributed to the strain aging by the numerous low stress amplitude cycles under intermittent loading, which strengthens the local region ahead of the initiated crack tip by the former high stress amplitude cycles and improves the fatigue life.
关键词Very high cycle fatigue High strength steels Intermittent loading Ultrasonic fatigue technique
DOI10.1016/j.ijfatigue.2018.07.033
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000449240200002
关键词[WOS]LOW-CARBON STEEL ; METALLIC MATERIALS ; FREQUENCY ; BEHAVIOR
WOS研究方向Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS类目Engineering ; Materials Science
项目资助者National Natural Science Foundation of China [11572325, 11425211] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040503, XDB22020201, XDB22020200]
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力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78137
专题非线性力学国家重点实验室
作者单位Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China; Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
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Sun CQ,Song QY,Hu YP,et al. Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime[J]. INTERNATIONAL JOURNAL OF FATIGUE,2018,117:9-12.
APA 孙成奇,Song QY,胡远培,&魏宇杰.(2018).Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime.INTERNATIONAL JOURNAL OF FATIGUE,117,9-12.
MLA 孙成奇,et al."Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime".INTERNATIONAL JOURNAL OF FATIGUE 117(2018):9-12.
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